Print head for printing three-dimensional structures made of concrete and a method therefor

Abstract

A print head for printing three-dimensional structures made of concrete and a method used to deposit layers of concrete material one on top of the other. The print head is configured to be moved in space and to deposit individual layers of a concrete material, which forms the structure to be produced, one on top of the other. The print head includes a feeder configured to provide the concrete material, a conveying device configured to receive the concrete material from the feeder and to convey it, a shaping section configured to be filled with the pressurized concrete material and to define lateral dimensions of the layer to be deposited, an exit section pointing in a direction opposite to a feed direction of the print head, and an exiting prevention section configured to prevent the concrete material from exiting in the feed direction of the print head.

The invention claimed is: 
     
       1. A print head for printing three-dimensional structures made of concrete, where said print head is configured to be moved in space and to deposit individual layers of a concrete material one on top of the other which forms the structure to be produced, said print head comprising:
 a feeder which is configured to provide said concrete material; 
 a conveying device which is configured to receive said concrete material from said feeder and convey said concrete material; 
 a shaping section which is configured to be filled by the concrete material that is pressurized and to define at least lateral dimensions of one of said layers to be deposited; 
 an exit section pointing in a direction opposite to a feed direction of said print head; and 
 an exiting prevention section which is configured to prevent said concrete material from exiting in the direction of said feed direction of said print head; 
 wherein said conveying device is an auger device; 
 wherein said shaping section comprises a controllable profiling device which is configured to be able to vary a layer thickness of the one of said layers to be deposited; and 
 wherein said controllable profiling device is configured to form at least one section along a width direction of the one of said layers made of concrete material to be concave with regard to the layer thickness.